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| Material item |
Aluminum oxide | ZTA | Zirconia |
| Volume density(g/cm3) | 3.9 | 4.17 | 6.0 |
| Vickers hardness(GPa) | 13 | 12 | 11 |
| Bending strength(MPa) | 350 | 480 | 800 |
| Fracture tenacity(MPa.m1/2) | 4 | 5 | 9 |
| Young's modulus(GPa) | 370 | 330 | 200 |
| Abrasion resistance(min/cm3) | 15 | 35 | 40 |
| Linear expansion coefficient(40-800ºC)(×10-6/ºC) | 8.0 | 8.8 | 11.0 |
| Roughness(Ra)(μm) | 0.3 | 0.2 | 0.1 |
| Acid resistant(95%sulfuric acid,95ºC)(WT Loss,mg/cm2.d) | 0.25 | 0.2 | 0.04 |
| Alkali resistance(30%caustic sodium,80ºC)(WT Loss,mg/cm2.d) | 0.05 | 0.06 | 0.08 |
